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US Patent: 1,768,962
Expansion boring tool
Patentee:
Christian C. Koeln (exact or similar names) - St. Louis, MO

USPTO Classifications:
408/179

Tool Categories:
metalworking machines : drilling and boring : boring heads

Assignees:
Davis Boring Tool Co. - St. Louis, MO

Manufacturer:
Davis Boring Tool Co. - St. Louis, MO

Witnesses:
Unknown

Patent Dates:
Applied: Feb. 23, 1924
Granted: Jul. 01, 1930

Patent Pictures:
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Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Davis Boring Tool Co.

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